Brooke has an end of the summer party on the beach. As Nathan comes home from basketball camp, Haley tries to tell him how she feels.

Elsewhere Lucas deals with Brooke's rules for dating and Peyton deals with family issues.

The Ravens begin basketball practice. New team captain Nathan clashes with Lucas over Haley, and a new cheerleader sets her sights on Lucas. Elsewhere, Dan's mayoral bid takes a surprising turn when an unlikely opponent emerges, Karen.

As the town readies for the Ravens' first basketball game, Lucas worries that his head and heart aren't in it. Nathan accuses Lucas of being the Ravens' weak link. Peyton and Haley mend fences to support Brooke in a time of need. When the mayoral race tightens, Dan resorts to a smear campaign.

As the students meet with the school counselor to plan for the future, Nathan and Haley realize they want to attend different colleges across the country from one another and Brooke discovers Rachel's reasons for submitting her designs to Rogue Vogue. Meanwhile, Ellie and Peyton bond as they finish the benefit album.

Due to the aftermath of the release of the time capsule, chaos breaks out. Someone is holding students of Tree Hill hostage with a gun, shooting. While lives hang in the balance, Nathan and Lucas put themselves at risk to protect their friends and loved ones. Young lives are shattered and two lives will end.

Lucas attempts to play in the first game after Keith's death, but cannot bring himself to do it; Nathan and Haley prepare to renew their vows, while Mouth tries to get closer to Rachel; Peyton receives a surprising offer; and Brooke finds a way to get revenge on Rachel.

Haley argues about her wedding dress with Brooke during the rehearsal dinner. Elsewhere Karen and Lucas arrive back in town.

And Peyton is surprised by what she finds...